Overview
Kewalo Substation is an operational electrical substation in Honolulu, Hawaii, owned and operated by Hawaiian Electric Company. It handles voltages of 138 kV, 46 kV, and 25 kV, serving the Oahu grid.
Kewalo Substation is an electrical substation located in Honolulu, Hawaii, United States. Owned and operated by Hawaiian Electric Company, the facility is a key node in the Oahu power grid, stepping down transmission voltages for local distribution. The substation handles multiple voltage levels including 138 kV, 46 kV, and 25 kV, indicating its role in both high-voltage transmission and medium-voltage distribution. As part of the Hawaiian Electric system, Kewalo Substation operates under the regulatory oversight of the Hawaii Public Utilities Commission and adheres to NERC reliability standards for grid stability. The substation's equipment likely includes modern switchgear and transformers to manage the island's electrical load, which is critical given Hawaii's isolated grid and reliance on renewable energy integration. The substation serves the urban Honolulu area, providing reliable electricity to residential, commercial, and industrial customers. Its location near the coast requires resilience against tropical weather and sea-level rise. The facility supports grid stability and helps integrate distributed solar generation, which is prevalent in Hawaii.
Environmental context
Kewalo Substation is situated in an urban coastal environment in Honolulu, where electrical infrastructure must withstand tropical storms, high humidity, and salt spray. The substation's voltage levels and equipment age are critical for grid reliability, especially as Hawaii transitions to renewable energy. Its urban location means it serves dense population centers, requiring robust safety and noise mitigation measures.
Frequently asked questions
Kewalo Substation is located in Honolulu, Hawaii, United States, at coordinates 21.294556 N, -157.849254 W.
Kewalo Substation is owned and operated by Hawaiian Electric Company, the primary electric utility serving Oahu.
Kewalo Substation handles voltages of 138 kV, 46 kV, and 25 kV, serving both transmission and distribution functions.
As part of the US grid, Kewalo Substation operates under NERC reliability standards and is regulated by the Hawaii Public Utilities Commission.
Kewalo Substation is a critical node in Oahu's isolated grid, helping to distribute power from generation sources to urban Honolulu and supporting grid stability with renewable energy integration.